Chair-iron.



119.781,491.;v f ,'PATENTBDJAN.31,1905. H.W.1 soLENs. CHAIR IRON.

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` atten/w Patented January 31, 1905.

PATENT OEEICE.

HARRY W. ROLENS, lor rOR'r WASHINGTON, WISCONSIN.

CHAIR-IRON.

SPECIFICATION forming part of Letters Patent No. 781,491, dated January 31, 1905.

- Application ined september `16, 1910s.- seriai No. 173,403.

To all whom, it may concern:

Beitknown that I, HARRY W.BOLENS, acitizen of the United States, residing at PortWashington, in the county of Ozaukee and State of Wisconsin, have invented a Chair- Iron, of which the following is a specification.

This invention relates to improvements in chair-irons, and more particularly to that class made mainly of sheet-steel, thouglnas will'be hereinafter apparent, the invention is not at all limited to the use of this material; but the parts may, if preferred, be cast. p

The principal Objects of the presentinvention are simplicity, compactness, Strength, durability, as well as economy of manufacture,

all o f which are fulfilled by the novel features of construction hereinafter described, and particularly pointed out in the claims.

Referring to the drawings, Figure 1 is atop plan view of a chair-iron embodying my improvements. Fig. 2 is a vertical longitudinal sectional view of the same. Fig-3 is a detail in plan of the adjusting-bolt-receivin g bridgepiece. Fig. 4 is a front elevation of the chairiron, the tension device removed and the spider-arms shown in transverse section. Fig. 5 is an elevation of a chair-iron of the highfulcrum type and 'embodying my invention. Similar numerals indicate similar parts in all the figures of the drawings.

The chair-iron comprises the usual and preferably cast-metal yoke 1, having Vthe central post-receiving Socket 2 and vertically-disposed end bearing terminals or ears 3.

The spreader or stretcher 4 ,is preferably struck up from a blank of sheet-steel and comprisesthe upper rectangular-main portion or base 5, the opposite and usual depending pivoting-ears 6, and at each side of the latter inwardly-disposed stop Hanges or lugs 7, the base, ears, and stop-lugs all being integral.

By skiving out or removing portions of the irons commonly known to the trade as the lOw-fu'lcrum variety,) and at their lower ends said ears Gare pivoted to the terminals 8 by theusual crosspin 8, whereby the stretcher 4 is free to oscillate laterally in either direction until .the stop-lugs 7 thereof contact with the adjacent edges of the terminals 3 of the yoke.

Seated against Vand supported in any suitable manner by the two rear stop-lugs 7 is the inner spring-supporting compression-plate 9, and'through and beyond the same passes the tension rod or bolt 10, the said holt at its rear end having the usual head and retaining the outer companion compression-plate 11. Be-

tween the two plates 9 and 11 are arranged the s ingle orfdouble coiled springs 12.

Y Near their upper ends the. two yoke-terminals 3 are connected by a transverse shaft 13, the same having its intermediate portion at its center offset or bent, as at 14. (See Figsl 2, 3, and 4. )A Suspended upon this shaft in a loose manner, by means of eyes 15 formed at its rear edge and at its ends, is a transverse tension-rod-suppor'ting bridge-piece 16. at the center of which, opposite the offset 14, is formed a transverse bearing-eye 17, through and beyond which extends the front or threaded end of the tension-rod 10. At its outer or front end there is mounted on the rod and bearing against the eye in the bridge-piece the usual adjusting hand nut or wheel 18.

Seated and secured upon the stretcher 4 in any suitable manner are the spider-arms 19, in this instance formed angular in cross-section and fitted over the angles of the stretcher, to which they are securely riveted, as at 20.

It will be obvious thatv the rear stop-lugs 7 7 will constitute in addition to their function as stops the further function of supports Yfor the inner compression -plate 9; also, as

the stretcher tilts backward the bridge-piece 16 will adjust itself to suoli position of the tension-rod as it is necessaryfor the latter to assume, thesame being accomplished in a perfectly noiseless manner.

In Fig. 5 it will be observed that I have illustratedv my improvedA bridge-piece in connection with what is generally termed a highfulcrum.1ron, whereln, as 1s well known, the

fulcrum of the iron is above the center of the same. In this connection it will be observed that the pintle-pin 8 is above the bridgeqiece 16 and its support, the latter being carried by the` `stretcher or spreader, whereas in the former instance the yoke formed the support therefor. Of course this is a mere reversal of the construction formerly shown.

Any suitable stops-as, for instance, l8-for the purpose of limiting the movement of the stretcher or spreader may be provided, the same being common and not necessary to show.

Having described my invention, what I claim is,-

1. In a chair-iron, the combination o f a yoke, a stretcher having depending terminals pivoted upon those of the yoke, a tension device supported by the stretcher, and a transverse bridge-piece provided with terminal eyes suspended from the yoke-terminals and having a central eye for the tension-rod of said tension device.

2. In a chair-iron, the combination of a yoke, a stretcher pivotally mounted thereon, a tension device carried by the stretcher, a shaft connecting the terminals of said yoke, and a bridge-piece having eyes loosely hung from the shaft and provided with a central bearing for the tension-rod of said tension device.

3. In aehair-iron, the combination ofayoke, a stretcher pivotally mounted thereon, a tension device carried by the stretcher, a shaft connecting the terminals ol' said yoke and provided with a central crank or oilset, and a bridge-piece provided with eyes loosely receiving the transverse shaft at each side of the crank thereof and having a central eye alining with said crank and receiviiig the tensionrod of said tension device.

4i. In a chair-iron,'the combination o i a yoke, a stretcher terminating in bearing-ears pivoted to the yoke and at each side thereofI provided with depending inwardly-disposed lugs forming stops adapted to abut against the terminals of the yoke, a transverse shaft connecting the latter terminals and having a central offset, a bridge-piece having a central bearing-eye and terminal eyes loosely hung upon the shaft, and a tension device supported by the rear lugs of the stretcher and having` its tension-rod passed through the central eye of the bridge-piece.

In testimony whereof I have sign ed my name to this specification in the presence ol two subscribing witnesses.

HARRY \V. BOLENS.

Titnessesr EDWARD BARELMAN, T. A. BoERNnR. 

